After being diagnosed with plagiocephaly, Miller began wearing a cranial remolding orthosis (baby helmet) for treatment. My Little Blue Helmet is based on the true story of Miller's journey. In this story, Miller asks his mother many questions that a typical child might ask about wearing a helmet. His mother recaps the journey from the day he was diagnosed until the day he graduated from the helmet. This book was written to encourage other families who have children undergoing treatment for plagiocephaly.